Analytical approach for the design of class-E dc-dc resonant converters: Matlab software and datasets

Celentano, Andrea; Pareschi, Fabio; Diaz, Victor R. Gonzalez; Rovatti, Riccardo; Setti, Gianluca

doi:10.5281/zenodo.3898565

Cited by 1 publication

(5 citation statements)

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“…The values of q I , q R and q M associated to each point can be found in the datasets provided in [40]. Interestingly, q I and q R do not feature a large spread of their value but are indeed limited from a few tenths to a few units.…”

Section: A Existence Of An Optimal Solutionmentioning

confidence: 99%

“…KA , but independently of v DS (0) thanks to the particular choice of the reference time θ = 0. The Matlab software developed, along with all the software used in this paper, is freely distributed in [40].…”

Section: Dimensionless Circuit Analysis and Designmentioning

confidence: 99%

“…The figure refers to the lossless system, i.e., with v ON d = v ON b = 0 and all quality factors to infinity. All the datasets are included in [40]. In our intention, these plots have to be used as a proxy for checking the existence of the solution in a real lossy system, under the assumption that the results may slightly change once the lossy parameters are considered, and actual existence has to be verified.…”

Section: A Existence Of An Optimal Solutionmentioning

confidence: 99%

“…The orange area of the plots in Figure 6 includes all points (k I , k R ) for which the solution of the design problem can only be found by relaxing the system of equations. Also, these datasets are included in [40], where the considered point is that ensuring the smallest value of i (0) inv .…”

Section: B Existence Of Sub-optimal Solutionsmentioning

confidence: 99%

“…Despite the fact that the convergence of a standard solution is quite easy, finding a higher harmonic solution is not easy and requires some guidance of the design optimization algorithm. Many higher harmonic solutions are proposed in the datasets provided in [40], but it is not possible for us to show either a solution existence space as that of Figure 6, or a stress and efficiency analysis.…”

Section: F Uniqueness Of the Optimal Solutionmentioning

confidence: 99%

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A Methodology for Practical Design and Optimization of Class-E DC-DC Resonant Converters

et al. 2020

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In recently published papers, an innovative analytical approach for the design of a class-E resonant dc-dc converter has been first proposed and further extended to many other class-E converter topologies. Its peculiarity is to be dimensionless and based on the exact solution of the system of differential equations regulating the behavior of the circuit, ensuring very high precision and reliability with respect to all methodologies previously proposed by the state-of-the-art and based on the so-called sinusoidal approximation. Here, we review this methodology and improve it in a twofold way. On the one hand, we propose alternative modeling for some devices (in particular the transformer), increasing both flexibility and generality, with the possibility to extend the application to more topologies and more working points. On the other hand, a new normalization is proposed, showing that the actual dimension of the design workspace is 2, and not 3 as assumed in the previous works. This has important consequences. As an example, the solution existence condition can be represented on a simple 2D plot, with the possibility to immediately check whether the optimal class-E condition can be ensured or not. Furthermore, we can completely and conveniently explore the entire design space to investigate properties such as the stress on the switching devices or the root-mean-square currents, allowing further optimization of the converter design. INDEX TERMSCircuit theory, class-E converters, dc-dc converters, resonant converters. I. INTRODUCTIONResonant dc-dc converters have been introduced to operate at high switching frequencies and so increase system power density [1]-[8], with advantages also in terms of dynamic performance [2] and EMI [8], [9]. Frequencies up to the VHF range 30 − 300 MHz are possible [6], [7] by lowering switching losses thanks to techniques used in radio-frequency (RF) power amplifiers [1], [2], [10], thus overcoming the main drawback of conventional switching topologies given by the frequency-dependent losses.We focus here on the class-E approach [2], [5], featuring the so-called soft-switching technique in opposition to the hard-switching of class-D converters. It was first proposedThe associate editor coordinating the review of this manuscript and approving it for publication was Yuh-Shyan Hwang.

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Section: A Existence Of An Optimal Solutionmentioning

confidence: 99%

Section: Dimensionless Circuit Analysis and Designmentioning

confidence: 99%

Section: A Existence Of An Optimal Solutionmentioning

confidence: 99%

Section: B Existence Of Sub-optimal Solutionsmentioning

confidence: 99%

Section: F Uniqueness Of the Optimal Solutionmentioning

confidence: 99%

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